.\" Copyright (c) 2006,2008 Joseph Koshy.  All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" This software is provided by Joseph Koshy ``as is'' and
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.\" for any direct, indirect, incidental, special, exemplary, or consequential
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.\" or services; loss of use, data, or profits; or business interruption)
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.\" $Id: elf_getident.3 3956 2022-03-12 12:39:30Z jkoshy $
.\"
.Dd July 3, 2006
.Dt ELF_GETIDENT 3
.Os
.Sh NAME
.Nm elf_getident
.Nd return the initial bytes of a file
.Sh LIBRARY
.Lb libelf
.Sh SYNOPSIS
.In libelf.h
.Ft char *
.Fn elf_getident "Elf *elf" "size_t *sz"
.Sh DESCRIPTION
Function
.Fn elf_getident
returns a pointer to the initial bytes of the file for descriptor
.Fa elf .
.Pp
If argument
.Fa sz
is non-null, the size of the identification area returned is written
to the location pointed to by
.Fa sz .
This location is set to zero on errors.
.Sh RETURN VALUES
Function
.Fn elf_getident
will return a
.No non- Ns Dv NULL
pointer to the initial bytes of the file if successful, or
.Dv NULL
if an error condition is detected.
.Sh ERRORS
Function
.Fn elf_getident
can fail with the following errors:
.Bl -tag -width "[ELF_E_RESOURCE]"
.It Bq Er ELF_E_ARGUMENT
A
.Dv NULL
value was passed in for argument
.Fa elf .
.It Bq Er ELF_E_SEQUENCE
ELF descriptor
.Fa elf
was opened for writing and function
.Fn elf_getident
was called before a call to
.Xr elf_update 3 .
.El
.Sh SEE ALSO
.Xr elf 3 ,
.Xr elf32_getehdr 3 ,
.Xr elf64_getehdr 3 ,
.Xr elf_getarhdr 3 ,
.Xr elf_getbase 3 ,
.Xr elf_getflags 3 ,
.Xr elf_kind 3 ,
.Xr elf_rawfile 3 ,
.Xr elf_update 3 ,
.Xr gelf 3 ,
.Xr gelf_getclass 3 ,
.Xr gelf_getehdr 3
